Let x and y distinct vectors in Rn with ||x||2 = ||y||2.Define Show that (a) ||x-y||22 =

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Let x and y distinct vectors in Rn with ||x||2 = ||y||2.Define
Let x and y distinct vectors in Rn with ||x||2

Show that
(a) ||x-y||22 = 2(x-y)Tx
(b) Qx = y

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